CN211858757U

CN211858757U - Battery with a battery cell

Info

Publication number: CN211858757U
Application number: CN202020894641.7U
Authority: CN
Inventors: 李廷永; 徐卫潘; 李义
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-11-03
Anticipated expiration: 2030-05-25

Abstract

The application provides a battery, including the casing with set up in the electric core subassembly of casing, the electric core subassembly includes two at least electric core units. A first cooling part and a heat conducting part are arranged between every two adjacent battery cell units. The first cooling part is located between the battery cell unit and the heat conduction part, and one side of the heat conduction part, which is far away from the first cooling part, is in contact with the battery cell unit. The battery absorbs and conducts heat generated by the battery cell unit by arranging the first cooling part and the heat conducting part, so that the heat dissipation performance of the battery is improved, the temperature of the battery is reduced, and the problem of overhigh peak temperature of the battery is avoided.

Description

Battery with a battery cell

Technical Field

The present application relates to a battery.

Background

The battery can easily generate a large amount of heat in the process of high-rate charge and discharge, and the current battery does not have a heat dissipation structure and has poor heat dissipation performance, so that the peak temperature of the battery core is overhigh, and the use performance and the safety performance of the battery are influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a battery having excellent heat dissipation performance.

A battery comprises a shell and a battery core assembly arranged on the shell, wherein the battery core assembly comprises at least two battery cell units. A first cooling part and a heat conducting part are arranged between two adjacent battery cell units, the first cooling part is arranged between the battery cell units and the heat conducting part, and one side of the heat conducting part, which deviates from the first cooling part, is in contact with the battery cell units

In an optional embodiment, the battery further comprises a second cooling element, wherein the second cooling element is connected with a tab assembly of the cell assembly, and the tab assembly comprises a plurality of tabs of the cell units.

Furthermore, the battery also comprises a tab adapter plate, and the second cooling part is connected with a tab assembly of the battery core assembly through the tab adapter plate.

In an optional embodiment, the second cooling element is provided with a plurality of grooves, and the overlapping portions of the tabs are accommodated in the grooves.

In an optional embodiment, the heat conducting member includes a base plate and two side plates, the two side plates are disposed on two opposite sides of the base plate, and the cell unit and the first cooling member are accommodated in an inner space defined by the base plate and the two side plates.

Further, along the width direction of the battery cell unit, two opposite sides of the battery cell unit are respectively connected with the two side plates.

In an alternative embodiment, the first cooling element is perforated.

Further, a plurality of the through hole arrays are distributed.

In an optional embodiment, the battery includes a buffer member, the cell unit has a first end and a second end opposite to each other, and the buffer member is disposed at the first end and the second end.

In an alternative embodiment, the housing comprises two oppositely disposed first side panels and two oppositely disposed second side panels, the second side panels comprising the recesses.

In an alternative embodiment, the second cooling element is a phase change cooling element.

In an alternative embodiment, a heat-conducting silicone grease is filled between the side surface of the heat-conducting member and the housing to connect the heat-conducting member and the housing.

The battery absorbs and conducts heat generated by the battery cell unit by arranging the first cooling part and the heat conducting part, so that the heat dissipation performance of the battery is improved, the temperature of the battery is reduced, and the problem of overhigh peak temperature of the battery is avoided.

Drawings

Fig. 1 is an exploded view of a battery in one embodiment.

Fig. 2 is a perspective view illustrating an electrode assembly of the battery shown in fig. 1.

Fig. 3 is an exploded view of the electric core assembly shown in fig. 2.

Fig. 4 is a schematic structural view of the first cooling member in another embodiment.

Fig. 5 is a schematic view of the second cooling element in another orientation.

FIG. 6 is a top view of an electrical core assembly and housing in one embodiment.

Fig. 7 is a partially enlarged view of fig. 6.

Description of the main element symbols:

the specific implementation mode is as follows:

the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The application provides a battery, including the casing with set up in the electric core subassembly of casing, the electric core subassembly includes two at least electric core units. Be equipped with first cooling member and heat-conducting piece between two adjacent electric core units, first cooling member set up in electric core unit with between the heat-conducting piece, the heat-conducting piece deviates from one side contact of first cooling member electric core unit.

Some embodiments of the present application are described in detail. In the following embodiments, features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, 2 and 3, in one embodiment, a battery 100 includes a core assembly 10 and a housing 20, the core assembly 10 is disposed in the housing 20, and the core assembly 10 includes at least two cell units 111. A first cooling member 112 and a heat conducting member 113 are disposed between two adjacent cell units 111. The first cooling member 112 is disposed between the cell unit 111 and the heat conduction member 113, and a side of the heat conduction member 113 facing away from the first cooling member 112 contacts the cell unit 111. The heat conduction member 113 is used for conducting heat generated by the cell unit 111 to the casing 20.

In an alternative embodiment, the battery 100 further includes a tab adaptor plate 12 and a second cooling member 13. The second cooling element 13 is connected to a tab assembly of the cell assembly 10, where the tab assembly includes a plurality of tabs 119 of the cell units 111. The second cooling member 13 is connected with the tab assembly of the core assembly 10 through the tab adaptor plate 12. Specifically, the tab adaptor plate 12 is disposed on a first end surface of the electric core assembly 10, in this embodiment, the first end surface is a top surface of the electric core assembly 10. The tabs 119 of the at least two cell units 111 are lapped on the tab transition plate 12, and the second cooling part 13 is arranged on the tab transition plate 12 to absorb and transfer heat generated by the tabs 119 and the tab transition plate 12. Further, referring to fig. 5, the second cooling element 13 is provided with a plurality of grooves 131 matching with the overlapping regions of the tabs, and the overlapping portions of the tabs 119 are received in the grooves 131. The inner sides of the grooves 131 can be tightly attached to the tabs 119, so that the second cooling element 13 can absorb a large amount of heat generated by the internal resistance of the tabs 119 during the high-rate charging and discharging of the electric core element 10, reduce the temperature of the tabs 119, and eliminate local hot spots of the electric core element 10.

In the embodiment of the present application, the first cooling element 112 and the second cooling element 13 are phase change cooling elements, the heat conducting element 113 is a uniform temperature heat conducting aluminum sheet with good heat conducting performance, and the housing 20 is made of a metal material with a high heat conducting coefficient. One surface of the first cooling member 112 is tightly attached to the cell unit 111, and the other surface is tightly attached to the heat conducting member 113, so that heat generated during charging and discharging of the cell assembly 10 can be quickly absorbed and conducted to the casing 20, and the temperature peak value and the cell temperature difference of the cell unit 111 are reduced.

Referring to fig. 3 again, the battery 100 further includes a buffer, and the cell unit 111 has a first end 117 and a second end 118 opposite to each other, and the buffer is disposed at the first end 117 and the second end 118. Specifically, the buffer includes a first buffer 114 and a second buffer 115, where the first end 117 is a top end of the cell unit 111, and the second end 118 is a bottom end of the cell unit 111. The first buffer member 114 is disposed at a top end of the cell unit 111, and the second buffer member 115 is disposed at a bottom end of the cell unit 111 for protecting the cell unit 111.

In one embodiment of the present application, the thermal conductive member 113 is substantially semi-open and includes a base plate 1131 and two side plates 1132, and the two side plates 1132 are disposed on two opposite sides of the base plate 1131. The cell unit 111 and the first cooling member 112 are accommodated in an inner space surrounded by the base plate 1131 and the two side plates 1132. Along the width direction of the cell unit 111, two opposite sides of the cell unit 111 are respectively connected to the two side plates 1132. It is understood that a first cooling member 112, a heat conducting member 113 and a buffer member constitute a heat dissipation structure unit, so that the heat generated by the cell unit 111 can be absorbed by the first cooling member 112 and conducted away by the heat conducting member 113. A plurality of the cell units 111 are stacked to form an electric core 11, and the electric core assembly 10 includes one or more electric cores 11. In an alternative embodiment, a bottom plate may be further disposed at the bottom end of the substrate 1131 to cover the bottom surface of the second buffer 115.

Referring to fig. 4, in other embodiments of the present application, the first cooling element 112 is provided with a plurality of through holes 1121, and the plurality of through holes 1121 are distributed in an array. The through holes 1121 may be a strip-shaped hole, a square-shaped hole, a circular hole, or the like, and the

first cooling members

112a, 112b, and 112c respectively show different shapes of the through holes 1121, which is not limited thereto. The through hole 1121 provides a necessary expansion space for the electric core assembly 10. It is understood that the first cooling member 112d may not have openings if the cell 100 does not have the requirement of expansion space.

Referring to fig. 1, 6 and 7, the housing 20 includes two first side panels 21 disposed opposite to each other and two second side panels 22 disposed opposite to each other, and the second side panels 22 include a recess 221 for increasing a heat dissipation area of the housing 20. The assembly gap between the side surface of each of the heat-conducting members 113 of the cell assembly 10 and the second side panel 22 of the housing 20 is filled with heat-conducting silicone grease, so that the heat-conducting members 113 are connected to the second side panel 22 of the housing 20, and the heat of the cell units 111 can be conducted to the housing 20 through the heat-conducting members 113 to dissipate the heat.

The housing 20 further includes a base 23, and the first side panel 21, the second side panel 22 and the base 23 are riveted by bolts to form the housing 20. The battery 100 further includes a cap assembly 30, and the cap assembly 30 is riveted to the first and

second side panels

21 and 22 of the case 20 to seal the battery assembly 10.

The heat that the electricity core subassembly 10 charge-discharge of this application produced can dispel the heat through the heat-conduction way of electricity core unit 111, first cooling part 112, heat-conducting part 113 to casing 20 again, and the phase transition piece can absorb the heat that electricity core unit 111 produced fast simultaneously, and phase transition piece light in weight, thickness are thin, so can realize reducing the peak temperature of electricity core unit 111 and reduce the difference in temperature between electricity core unit 111 under the condition of not increasing electricity core subassembly 10 volume. In addition, when the battery 100 is left standing after the charge and discharge are completed, the heat absorbed by the first cooling member 112 can be quickly introduced into the heat conductive member 113 and dissipated through the case 20, thereby shortening the time for cooling the battery 100 when the battery is left standing. Meanwhile, the second cooling part 13 arranged at the lug 119 absorbs heat generated by the lug 119, so that local hot spots at the lug 119 during high-rate charge and discharge of the electric core assembly 10 are eliminated, and the service performance and safety performance of the battery 100 are comprehensively improved.

Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present application.

Claims

1. A battery comprises a shell and a battery core assembly arranged on the shell, wherein the battery core assembly comprises at least two battery cell units;

the battery is characterized in that a first cooling part and a heat conducting part are arranged between every two adjacent battery cell units, the first cooling part is arranged between the battery cell units and the heat conducting part, and one side of the heat conducting part, which is deviated from the first cooling part, is in contact with the battery cell units.

2. The battery of claim 1, further comprising a second cooling element coupled to a tab assembly of the cell assembly, the tab assembly including a plurality of tabs of the cell units.

3. The battery of claim 2 further comprising a tab adaptor plate, wherein the second cooling member is coupled to the tab assembly of the core assembly via the tab adaptor plate.

4. The battery of claim 2 wherein the second cooling element defines a plurality of recesses, the overlapping portions of the tabs being received in the plurality of recesses.

5. The battery of any of claims 1-4, wherein the thermal conductor member comprises a base plate and two side plates disposed on opposite sides of the base plate, and the cell unit and the first cooling member are received in an inner space defined by the base plate and the two side plates.

6. The battery of claim 5, wherein the two side plates are connected to two opposite sides of the cell unit along the width direction of the cell unit.

7. The battery of claim 5, wherein the first cooling member is perforated.

8. The battery of claim 7, wherein a plurality of the via arrays are distributed.

9. The battery of claim 5, wherein the battery includes a buffer, wherein the cell unit has first and second opposing ends, and wherein the buffer is disposed at the first and second ends.

10. The battery of claim 5, wherein the housing comprises two oppositely disposed first side panels and two oppositely disposed second side panels, the second side panels comprising a recess.

11. The battery of claim 2, wherein the second cooling element is a phase change cooling element.

12. The battery of claim 5, wherein a thermally conductive silicone grease is filled between the side of the thermally conductive member and the case to connect the thermally conductive member and the case.